Frustrated magnets can host numerous exotic many-body quantum and topological phenomena. ${\mathrm{GeNi}}_2{\mathrm{O}}_4$ is a three-dimensional $S=1$ frustrated magnet with an unusual two-stage transition to the two-dimensional antiferromagnetic ground state, while ${\mathrm{GeCu}}_2{\mathrm{O}}_4$ is a high-pressure phase with a strongly tetragonally elongated spinel structure and magnetic lattice formed by $S=1/2 {\mathrm{CuO}}_2$ linear chains with frustrated interchain exchange interactions and exotic magnetic behavior. Here, we report on the thin-film epitaxial stabilization of these two compounds. The developed growth mode, surface morphology, crystal structure, and copper valence state were characterized by in situ reflection high-energy electron diffraction, atomic force microscopy, x-ray reflectivity, x-ray diffraction, x-ray photoelectron spectroscopy, and resonant x-ray absorption spectroscopy. Our results pave an alternative route to the comprehensive investigation of the puzzling magnetic properties of these compounds and the exploration of emergent features driven by strain.

中文翻译：

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受挫锗基尖晶石薄膜的外延稳定

受挫的磁铁可以容纳许多奇异的多体量子和拓扑现象。 ${\mathrm{格尼}}_2{\mathrm{哦}}_4$ 是一个三维 $秒=1$ 具有不寻常的两阶段过渡到二维反铁磁基态的受挫磁体，而 ${\mathrm{锗铜}}_2{\mathrm{哦}}_4$ 是一种高压相，具有强烈的四方拉长尖晶石结构和磁晶格，由 $秒=1/2 {\mathrm{氧化铜}}_2$具有受挫的链间交换相互作用和奇异的磁性行为的线性链。在这里，我们报告了这两种化合物的薄膜外延稳定性。开发的生长模式、表面形貌、晶体结构和铜价态通过原位反射高能电子衍射、原子力显微镜、x 射线反射率、x 射线衍射、x 射线光电子能谱和共振 x射线吸收光谱。我们的结果为全面研究这些化合物令人费解的磁性以及探索由应变驱动的新兴特征铺平了道路。